import axios from 'axios'
import { Message } from 'element-ui'
//  import { MessageBox, Message } from 'element-ui'
import store from '@/store'
// import { getToken } from '@/utils/auth'
// 导入路由
import router from '@/router'

// create an axios instance
const service = axios.create({
  // 根据不同的环境变量来变化
  baseURL: '/api', // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

/* // request interceptor请求拦截器
service.interceptors.request.use(
  config => {
    // do something before request is sent

    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['X-Token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)
 */

// response interceptor响应拦截器
// service.interceptors.response.use(
/**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

/**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
// response => {
//   const res = response.data

// if the custom code is not 20000, it is judged as an error.
/* if (res.code !== 20000) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
) */
// axios请求拦截器
service.interceptors.request.use((config) => {
  // 将 token放置到请求头中
  const token = store.getters.token
  if (token) {
    config.headers.Authorization = 'Bearer ' + token
  }
  // 在发送请求之前做些什么
  return config
}, (error) => {
  // 对请求错误做些什么
  return Promise.reject(error)
})
// response interceptor添加响应拦截器
service.interceptors.response.use((response) => {
  //  移除axios的壳
  const res = response.data
  // 统一的对错误进行处理
  const { success, message } = res
  if (!success) {
    Message.error(message)
    return Promise.reject(new Error(message))
  }
  return res
}, (error) => {
  // 失败响应
  console.log(error)
  // Message.error('请求遇到了错误 ')
  // 10002就是前端与后端的约定：表示token失效了
  if (error.response.status === 401 && error.response.data.code === 10002) {
    // token过期了
    Message.error('登录会话已过期, 请重新登录~')
    // 进行退出action操作
    store.dispatch('user/logout')
    // 跳转到登录
    router.push('/login')
  }

  // 对响应错误做点什么
  return Promise.reject(error) // 返回执行错误 让当前的执行链跳出成功 直接进入 catch
})

export default service // 导出axios实例
